Barack Obama to welcome Donald Trump to White House

US President Barack Obama is set to meet his successor Donald Trump in the Oval Office for talks aimed at ensuring a smooth transition of power.

However, thousands of demonstrators took to the streets in several cities to voice their opposition to Mr Trump.

They shouted the slogan "Not my President", a term that was also trending on social media.

Mr Trump will become the 45th US president after securing a surprise victory over Hillary Clinton.

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• Mr Obama - who had branded Mr Trump "unfit" for office and campaigned against him - urged all Americans to accept the result of Tuesday's election.
  "We are now all rooting for his success in uniting and leading the country," he said.
  Defeated Mrs Clinton also told supporters Mr Trump had to be given a "chance to lead"